[BUG] nsh and SmartFS file system are not SMP-proof

### Description / Steps to reproduce the issue

1) On Pi Pico W board with Pi Pico SDK 2.0, setup a system with working flash SmartFS file system and without SMP, e.g.,
./tools/configure.sh -l raspberrypi-pico-w:nsh-flash

2) verify that the following file creation, deletion and smart_test command work
cd /flash
echo Hello_NuttX > test2.txt
cat test2.txt
smart_test -w 2 /flash/test2.txt
rm test2.txt

3) enable SMP and run ps or other command to verify that SMP is working
ref: https://blog.mark-stevens.co.uk/2023/06/adding-smp-to-nuttx-on-the-raspberry-pi-picow/

4) try to re-run commands in step 2)
notice that when executing file creation or deletion or smart_test command, nsh hangs. If there is a USB nsh and a telnet nsh, then both nsh hang.

Not sure if there is any other part of NuttX OS that is also not SMP-proof.

### On which OS does this issue occur?

[OS: Linux]

### What is the version of your OS?

Windows 11 WSL2 Ubuntu 22.04.2

### NuttX Version

NuttX 12.7.0-RC0 0976258-dirty Oct 4 2024 22:58:36 arm rasp

### Issue Architecture

[Arch: arm]

### Issue Area

[Area: OS Components]

### Verification

- [X] I have verified before submitting the report.